我必须这样做——尽管我不知道为什么。

I must—though I don't know why.

youdao

“一个字就是一个影子。”影子说，是因为它必须这样说。

"A word is a shadow, "said the shadow, and as such it must speak.

youdao

从逻辑上讲，总有一天他们必须这样做：因为地球是一个有限的空间。

Logically, one day they must: the planet is a finite place.

youdao

Why this struggle, and why must Milton struggle with such awkward metaphysical categories in order simply to address properly the power of light?

为什么弥尔顿必须,与这样一个奇怪的抽象的东西斗争,仅仅是为了恰当的描述光明的力量？

耶鲁公开课 - 弥尔顿课程节选

Redleaf went in and said, you should really do it and he convinced them, apparently, and they cut their dividend.

莱德利夫提出,你们必须要这样做,而且他说服了管理层,最终经营者决定降低红利

耶鲁公开课 - 金融市场课程节选

that after Lolita.) But what I mean is that the reader must know when and where to contribute his imagination, and this he does by trying to get clear the specific world the author places at his disposal.

有些人可能就会那样想）,但我的意思是,读者必须知道何时何地需要发挥想像力,这样以看清作者所设置的特定的世界,在这篇小品文中。

耶鲁公开课 - 1945年后的美国小说课程节选